If I had the certification and the alignment equipment I wouldn’t have the need for a mechanic. My hands are the only ones that touch my engine and I just finished a complete rebuild, I’m more than capable of fixing any issues that arise. I diagnosed the issue on the spot with nothing more than common sense. They are the closest shop to my house and at the time they had a master tech with 30+ years under his belt and owned a z32 as well, he has since retired.